When pitching to VCs on a first call, do you put up slides together?

Unless they tell me it's going to be super casual, yes I always try to have a pitch deck ready.

I like to share a deck via google meet via a secondary device like my iPad or iPhone.

Yes, it's common to use slides when pitching to VCs on a first call. Shark slides help in conveying key points and data effectively, enhancing your presentation's clarity and impact, aiding investors in understanding your proposition better.